George Zimmerman, left, and attorney Don West appear before Circuit Judge Kenneth R. Lester, Jr. Friday, June 29, 2012, during a bond hearing at the Seminole County Criminal Justice Center in Sanford, Fla. Zimmerman is charged with second-degree murder in the shooting of Trayvon Martin.

George Zimmerman, left, and attorney Don West appear before Circuit Judge Kenneth R. Lester, Jr. Friday, June 29, 2012, during a bond hearing at the Seminole County Criminal Justice Center in Sanford, Fla.

AP Photo/Orlando Sentinel, Joe Burbank

(CBS/AP) SANFORD, Fla. - A judge has set June 10, 2013 as the tentative trial date for the murder case against George Zimmerman, the Florida neighborhood watch volunteer accused of shooting unarmed teenager Trayvon Martin.

Judge Debra S. Nelson set the trial date during a court hearing on Wednesday morning. But Zimmerman's attorney said there are still several unresolved pretrial matters to complete. Another status hearing is set for December 10.

Zimmerman, 29, is charged with second-degree murder in the death of 17-year-old Martin on Feb. 26. Zimmerman has claimed he acted in self-defense and is pleading not guilty.

Attorneys in the case said they estimate the trial will last three weeks. A hearing is also set for October 19 so the judge can hear arguments on several new motions, including the defense asking for more time to interview state witnesses.